European natural gas infrastructure: The role of Gazprom in European natural gas supplies. Study Commissioned by The Greens/European Free Alliance in the European Parliament - Franziska Holz; Hella Engerer; Claudia Kemfert; Philipp M. Richter; Christian von Hirschhausen (Deutsches Institut für Wirtschaftsforschung (DIW), 2014)
urn:nbn:de:0084-diwkompakt_2014-0813
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